2021 HYUNDAI SONATA HYBRID fuel

01
1-19
Refuel to prevent Hybrid battery
damage
OOSHQ019011L
This message is displayed when the fuel
tank is nearly empty.
You should refill the fuel tank to prevent
hybrid battery damage.
Refill inverter coolant
OOSHQ019012L
This message is displayed when the
inverter coolant is nearly empty.
You should refill the inverter coolant.
Park with engine On to charge
battery
OOSHQ019013L
This message is displayed when the
hybrid battery power (SOC) level is low.
If this occurs, park the vehicle in a safe
location and wait until the hybrid battery
is charged.
Start engine to avoid battery
discharge
OOSHQ019027L
This message is displayed to inform the
driver the 12V battery may be discharged
if the ignition switch is in ON position
(without the
indicator ON).
Set the vehicle to the ready () mode
to prevent the 12V battery from being
discharged.

01
1-27
WARNING
If a fire occurs:
• If a small scale fire occurs, use a fire
extinguisher (ABC, BC) that is meant
for electrical fires.
If it is impossible to extinguish
the fire in the early stage, remain
a safe distance from the vehicle
and immediately call your local
fire emergency responders. Also,
advise them that a hybrid vehicle is
involved.
If the fire spreads to the high voltage
battery, large amount of water is
needed to put out the fire.
Using small amount of water or
fire extinguishers not meant for
electrical fires could cause serious
injury or death from electrical
shocks.
• Upon witnessing any sparks, gases,
flames, or fuel leakage of your
vehicle, immediately call emergency
services or contact an authorized
HYUNDAI dealer. Also, advise them
that a hybrid vehicle is involved.
WARNING
When a submersion in water occurs:
When your vehicle is flooded in water, a
high-voltage battery may cause shock
or fires. Thus, turn the hybrid system
OFF, take the key in your possession and
escape to a safe place. Never attempt
physical contact with your flooded
vehicle.
Immediately contact an authorized
HYUNDAI dealer and advise them that a
hybrid vehicle is involved.
When the Hybrid Vehicle Shuts
Off
When the high voltage battery or 12 volt
battery is discharged, or when the fuel
tank is empty, the hybrid system may
not operate while driving. When the
Hybrid system does not operate, do the
following:
1. Gradually reduce the vehicle speed.
Pull over your vehicle off the road in a
safe area.
2. Make sure the shift button is in P
(Park).
3. Turn ON the hazard warning flashers.
4. Turn OFF the vehicle, and try to
start the hybrid system again, while
depressing the brake pedal and
turning on the ignition switch.
5. When the hybrid system still does not
operate, refer to “If the 12 Volt Battery
Is Discharged” section in chapter 7.
Before jump-starting the vehicle,
check the fuel level and the exact
procedure to jump start. For further
details, refer to “If the 12 Volt Battery
Is Discharged” section in chapter
7. When the fuel level is low, do not
attempt to drive the vehicle only with
the battery power. The high voltage
battery may be discharged, and the
hybrid system will turn OFF.

2-3
02
„„Rear view
The actual shape may differ from the illustration.ODN8H019002
1. Door handle ..........................................5-28
2. Fuel filler door .......................................5-68
3. Rear tail lamp ........................................8-45
4. Trunk ......................................................5-63
5. Defroster ...............................................5-116
6. High mounted stop lamp .....................8-47
7. Antenna ................................................5-126
8. Rear view camera .................................5-84

02
2-11
RECOMMENDED LUBRICANTS AND CAPACITIES
To help achieve proper engine and powertrain performance and durability, use only
lubricants of the proper quality. The correct lubricants also help promote engine
efficiency that results in improved fuel economy.
These lubricants and fluids are recommended for use in your vehicle.
LubricantVolumeClassification
Engine oil
*1 *2 (drain and
refill)
4.5 US qt. (4.3 ℓ)API Lastest (SN PLUS) *3
Automatic transmission fluid6.3 US qt. (6.0 ℓ)
MICHANG ATF SP-IV, SK ATF SP IV,
NOCA ATF SP-IV, S-oil ATF SP-IV
HYUNDAI genuine ATF SP-IV
or other brands meeting the
above specification approved by
HYUNDAI Motor Co.
Coolant
8.6 US qt. (8.18 ℓ)Mixture of antifreeze and distilled
water (Ethylene glycol with
phosphate based coolant)
Brake fluid
*4required amount DOT-4
Fuel
13.2 gal. (50 ℓ)Refer to “Fuel requirements” in
chapter 1.
*1 : Refer to the recommended SAE viscosity numbers on page 12.
*2 : Engine oils labeled Energy Conserving Oil are now available. Along with other additional
benefits, they contribute to fuel economy by reducing the amount of fuel necessary
to overcome engine friction. Often, these improvements are difficult to measure in
everyday driving, but in a year’s time, they can offer significant cost and energy savings.
*3 : If the recommended engine oil is not available in your country, you are able to use API
SL/ILSAC GF-3 or ACEA A3.
*4 : To maintain the best braking performance and ABS/ESC performance, we recommend
that you use genuine brake fluid that conform to specifications. (Standard : SAE J1704
DOT-4 LV, ISO4925 CLASS-6 and FMVSS 116 DOT-4)

Vehicle Information
2-12
Recommended SAE Viscosity
Number
CAUTION
Always be sure to clean the area around
any filler plug, drain plug, or dipstick
before checking or draining any
lubricant. This is especially important
in dusty or sandy areas and when the
vehicle is used on unpaved roads.
Cleaning the plug and dipstick areas
will prevent dirt and grit from entering
the engine and other mechanisms that
could be damaged.Engine oil viscosity (thickness) has an
effect on fuel economy and cold weather
operating (engine start and engine oil
flowability). Lower viscosity engine oils
can provide better fuel economy and
cold weather performance, however,
higher viscosity engine oils are required
for satisfactory lubrication in hot
weather.
Using oils of any viscosity other than
those recommended could result in
engine damage.
When choosing an oil, consider the
range of temperature your vehicle will be
operated in before the next oil change.
Proceed to select the recommended oil
viscosity from the chart.
Temperature Range for SAE Viscosity Numbers
Temperature °C
-30 -20-10 010 20 30 4050
(°F) -10020 40 60 80 100120
Smartstream G2.0 GDi HEV
20W-50
15W-40
10W-30
0W-16, 0/5W-20, 0/5W-30
*1 : For better fuel economy, it is recommended to use the engine oil of a viscosity grade
0W-16 (API LATEST). However, if the engine oil is not available in your country, select the
proper engine oil using the engine oil viscosity chart.
An engine oil displaying this American Petroleum Institute(API) Certification Mark conforms to the International Lubricant
Specification Advisory Committee (ILSAC). It is recommended to
only use engine oils that uphold this API Certification Mark.

Instrument Cluster
4
Instrument Cluster ........................................................................\
....................4-4Instrument Cluster Control ........................................................................\
..................4-5
Adjusting instrument cluster illumination ................................................................4-5
Gauges and Meters ........................................................................\
..............................4-5
Speedometer ........................................................................\
.....................................4-5
Power gauge ........................................................................\
......................................4-5
Hybrid battery SOC (State of Charge) gauge ..........................................................4-6
Fuel gauge ........................................................................\
.........................................4-6
Outside temperature gauge ........................................................................\
..............4 -7
Odometer ........................................................................\
..........................................4-8
Range ........................................................................\
.................................................4-8
Transmission Shift Indicator ........................................................................\
...............4-9
Automatic transmission shift indicator ...................................................................4-9
Warning and Indicator Lights ........................................................................\
............4-10
Air Bag Warning Light ........................................................................\
......................4-10
Seat Belt Warning Light ........................................................................\
...................4-10
Parking Brake & Brake Fluid Warning Light ............................................................4-10
Regenerative brake warning light ........................................................................\
....4-11
Anti-lock Brake System (ABS) Warning Light ..........................................................4-11
Electronic Brake Force Distribution (EBD) System Warning Light ........................4-11
Electronic Parking Brake (EPB) Warning Light .......................................................4-12
AUTO HOLD Indicator Light ........................................................................\
............4-12
Electric Power Steering (EPS) Warning Light .........................................................4-12
Malfunction Indicator Lamp (MIL) ........................................................................\
..4-13
Charging System Warning Light ........................................................................\
.....4-13
Engine Oil Pressure Warning Light ........................................................................\
.4-13
Low Fuel Level Warning Light ........................................................................\
.........4-14
Service warning light ........................................................................\
.......................4-14
Exhaust system (GPF)warning light ........................................................................\
4-14
Master Warning Light ........................................................................\
......................4-15
Low Tire Pressure Warning Light ........................................................................\
....4-15
Electronic Stability Control (ESC) Indicator Light .................................................4-15
Electronic Stability Control (ESC) OFF Indicator Light ..........................................4-16
Immobilizer Indicator Light ........................................................................\
.............4-16
Immobilizer Indicator Light (with smart key) .........................................................4-16
Turn Signal Indicator Light ........................................................................\
...............4-17
Headlamp Warning Light ........................................................................\
.................4-17
4. Instrument Cluster

Ready indicator ........................................................................\
.................................4-17
EV mode indicator ........................................................................\
............................4-17
High Beam Indicator Light ........................................................................\
..............4-18
Light ON Indicator Light ........................................................................\
..................4-18
High Beam Assist indicator light ........................................................................\
.....4-18
Forward Collision-Avoidance Assist Warning Light ...............................................4-18
Lane Keep Assist Indicator Light ........................................................................\
..... 4-18
LCD Display Messages
........................................................................\
.......................4-19
Shift to P to start engine ........................................................................\
..................4-19
Shift to P ........................................................................\
...........................................4-19
Low key battery ........................................................................\
................................4-19
Press brake pedal to start engine ........................................................................\
...4-19
Key not in vehicle ........................................................................\
............................4-19
Key not detected ........................................................................\
..............................4-19
Press START button again ........................................................................\
..............4-19
12V battery discharging due to additional electrical devices ...............................4-19
Press START button with key ........................................................................\
...........4-20
Check BRAKE SWITCH fuse ........................................................................\
............4-20
Press START button while turning wheel ...............................................................4-20
Check steering wheel lock system ........................................................................\
.4-20
Door, Hood, Trunk Open Indicator ........................................................................\
.. 4-20
Sunroof Open
........................................................................\
...................................4-20
Low Pressure ........................................................................\
.....................................4-21
Lights Mode ........................................................................\
....................................... 4-21
Wiper
........................................................................\
.................................................4-21
Low washer fluid ........................................................................\
...............................4-21
Low fuel ........................................................................\
.............................................4-21
Engine has overheated ........................................................................\
.....................4-21
Check exhaust system ........................................................................\
.....................4-22
Check headlight ........................................................................\
...............................4-22
Check turn signal ........................................................................\
.............................4-22
Check brake light ........................................................................\
.............................4-22
Check headlamp LED ........................................................................\
......................4-22
Check Active Air Flap system ........................................................................\
..........4-22
Ready to start driving ........................................................................\
......................4-22
Check regenerative brakes ........................................................................\
.............. 4-22
Stop vehicle and check brakes
........................................................................\
.......4-22
4

Check Hybrid system ........................................................................\
.......................4-23
Stop safely and check Hybrid system ....................................................................4-23
Check Hybrid system. Do not start engine ............................................................4-23
Stop safely and check power supply ......................................................................4-23
Check virtual engine sound system ........................................................................\
4-23
Refuel to prevent Hybrid battery damage
.............................................................4-23
Refill inverter coolant ........................................................................\
......................4-23
Park with engine On to charge battery ..................................................................4-23
Start engine to avoid battery discharge .................................................................4-23
LCD Display (TYPE A, B) ........................................................................\
..........4-24LCD Display Control ........................................................................\
...........................4-24
LCD Display Modes ........................................................................\
............................4-25
Trip computer mode ........................................................................\
........................4-26
Turn By Turn (TBT) mode ........................................................................\
................4-26
Driving Assist mode ........................................................................\
.........................4-26
Master warning mode ........................................................................\
.....................4-27
User settings mode ........................................................................\
..........................4-27
Trip Computer ........................................................................\
..................................... 4-36
Trip modes
........................................................................\
........................................4-36
Average fuel economy/Instant fuel economy .......................................................4-36
Accumulated Info display ........................................................................\
................4-37
Drive Info display
........................................................................\
.............................4-37
Digital speedometer ........................................................................\
........................4-38
Smart shift ........................................................................\
........................................4-38
Engine coolant temperature ........................................................................\
...........4-38
LCD display (type c) ........................................................................\
................4-39LCD Display Control ........................................................................\
...........................4-39
View Modes ........................................................................\
.......................................4-40
Utility View Mode ........................................................................\
...............................4-41
Utility Items ........................................................................\
......................................4-41
Driving Assist view mode ........................................................................\
................4-42
Turn By Turn (TBT) view mode ........................................................................\
........4-42
Parking Assist view mode ........................................................................\
................4-42
Other Information Display ........................................................................\
..............4-43
Option Menu ........................................................................\
......................................4-43
Warning message mode ........................................................................\
................. 4-44
User Settings Mode
........................................................................\
...........................4-44
4